- Absence of order; a condition of not being arranged in an orderly manner.
- The children left the room in disorder.
- A disturbance of civic peace or of public order.
- The class was thrown into disorder when the teacher left the room
- The army tried to prevent disorder when claims the elections had been rigged grew stronger.
- (medicine) A physical or psychical malfunction.
- Bulimia is an eating disorder.